Most large online retailers, like fashion chain Asos, use fire spinklers in all their warehouses.
Asos lost £30 million worth of stock in a fire at its Barnsley warehouse in 2014 but the sprinkler system was hailed as one of the reasons the impact was reduced. Argos also has sprinkler systems in its large warehouses, a spokeswoman said.
The London Fire Brigade supported the call for more fire sprinklers.
“As well as limiting fire damage and being potentially life saving devices, sprinklers also help with business continuity by minimising disruption and allowing businesses to get back to normal as soon as possible,” deputy assistant commissioner for fire safety Andy Hearn said.